
Engineered for durability and precise engagement, our drive & drill bits provide consistent torque, reduced wear, and a secure fit with a wide range of fasteners. Designed for both professional and on-site use, they offer reliability, ease of handling, and long service life across maintenance, assembly, and light to heavy-duty applications.

TOWER Online Ordering
Need to reorder, check stock or place an order after hours. The TOWER Online Ordering System lets you browse and order 24/7 from any device.
High-Speed Steel (M35)
Cobalt Double End Drills

Product Code (SKU)
Size
Overall Length
Flute Length
Pack
#
Inch
D (mm)
L (mm)
FL (mm)
pcs
HSS-CoDBDN30
30
1/8″
3.3
62
9.5
10
HSS-CoDBDN20
20
5/32″
4.1
55
13
10
HSS-CoDBDN11
11
3/16″
4.85
49
16
10
High-Speed Steel (M2)
Cobalt Double End Drills

Product Code (SKU)
Size
Overall Length
Flute Length
Pack
#
Inch
D (mm)
L (mm)
FL (mm)
pcs
HSS-DBDN30
30
1/8″
3.3
62
9.5
10
HSS-DBDN20
20
5/32″
4.1
55
13
10
HSS-DBDN11
11
3/16″
4.85
49
16
10

Engineered for durability and precise engagement, our drive & drill bits provide consistent torque, reduced wear, and a secure fit with a wide range of fasteners. Designed for both professional and on-site use, they offer reliability, ease of handling, and long service life across maintenance, assembly, and light to heavy-duty applications.
High-Speed Steel (M35)
Cobalt Double End Drills

Product Code (SKU)
Size
Overall Length
Flute Length
Pack
#
Inch
D (mm)
L (mm)
FL (mm)
pcs
HSS-CoDBDN30
30
1/8″
3.3
62
9.5
10
HSS-CoDBDN20
20
5/32″
4.1
55
13
10
HSS-CoDBDN11
11
3/16″
4.85
49
16
10
High-Speed Steel (M2)
Cobalt Double End Drills

Product Code (SKU)
Size
Overall Length
Flute Length
Pack
#
Inch
D (mm)
L (mm)
FL (mm)
pcs
HSS-DBDN30
30
1/8″
3.3
62
9.5
10
HSS-DBDN20
20
5/32″
4.1
55
13
10
HSS-DBDN11
11
3/16″
4.85
49
16
10

TOWER Online Ordering
Need to reorder, check stock or place an order after hours. The TOWER Online Ordering System lets you browse and order 24/7 from any device.

Need to know more?
Phone
+61 (02) 9636 2369
Address
TOWER Fastening System
2/2 Stoddart Rd
Prospect NSW 2148
Copyright © 2026 TOWER Fastening System

Need to know more?
Phone
+61 (02) 9636 2369
Address
TOWER Fastening System
2/2 Stoddart Rd
Prospect NSW 2148
Copyright © 2026 TOWER Fastening System